As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT: 9200, DURING APPROACH LANDING GEAR UNSAFE LIGHTS DID NOT ILLUMINATE (3) GREEN INDICATION DID NOT ILLUMINATE WHEN GEAR HANDLE PLACED IN THE DOWN POSITION. RETURNED TO DEPARTURE, LANDED WITHOUT INCIDENT. REPLACED CIRCUIT BREAKER 16 AND RESECURED LT MAIN LANDING GEAR DOWNLOCK SWITCH.